Fig.11-1 Beam,arch and suspension system (Idealistic arch/suspension shape is equivalent to moment diagram) 业业业Y IDEALISTIC ARCH SHAPE GIVEN BY BEAM: MOMENT DIAGRAM RISE二DARCH C SECTION M-ARM IS SMALL BEAM BEAM 二=很===二>c=三三==二= SAG=h % IDEALISTIC S元NS1ON SUSPENSION SHAPE GIVEN BY MOMENT DIAGRAM NOTE THAT THC "IDEAL"SHAPE FOR AN ARCH OR SUSPENSION SYSTEM IS EQUIVILENT TO IHE DESIGN LOAD MOMENT DIAGRAMFig.11-1 Beam,arch and suspension system (Idealistic arch/suspension shape is equivalent to moment diagram)